Update a node's addressing information in a directory service.

     UPDATE [DECNET] NODE node-name
         [ DIRECTORY_SERVICE dir-service ]
         [ ADDRESS addr-value ]
         [ PHASEIV_PREFIX addr-prefix ]
         [ REVERSE_DIRECTORY rev-dir-name ]

 This reads a node's addressing information directly from the node, using
 network management, and modifies the node registration to contain the
 correct addresses.

 If an explicit node name is entered, the address to use to connect to the
 node can also be explicitly entered.  If an address is not specified, the
 currently registered addresses for the node are tried.  If none of these
 result in a connection, an error is reported.

 If the node name contains a wildcard, an address cannot be specified.  In
 this case, the currently registered addresses for each matching node name
 are tried.  If none of these result in a connection for a particular node,
 an error is reported for that node.